First let me start off with an intro. I like the concept of this distro. I like that it uses Ubuntu's easiness and Freespire's concept of giving everything to the user without holding back because of free software only. Hopefully this distro becomes more popular and succeeds in its goals. Also, I applaud the change to gnome

Now onto the suggestion.

Well, the distro is named Linux Mint so it only makes sense if the theme color was a mint green. The icons (including the ubuntu icon) should also be changed and an option (if not default) change of the gnome panels to green (preferably a shiny type, perhaps I'll give an example later). Blue could be kept as an alternate choice.

I like the idea of going with a Minty theme. but like the developers said they don't have the time to do a lot of the artwork and such. Maybe Mint users can submit art or demos. I have seen a lot of great art on the net.